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    <script>
        let age = [12,15,18,23,25,65,47];
        let obj = {"age": age};
        age_idf = obj.age.filter((item, index, array) => {
            console.log(array);
            console.log(this);
            return index > 2;
        })
        console.log(age_idf);
    </script>
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